Essentially, it is carte blanche to invade, search, and if there is any excuse, to remove items of value from people's homes. In short, legalized pilfering.
Depending on Wisconsin's civil forfeiture statutes, all they have to say is they believe that somehow whatever they seize is related to or a benefit of or property purchased with the proceeds of any illegal activity, and they can take that property without warrant nor charges filed and the owner must sue to get their property back.
I agree.
The problem I see here is that he invited the police into his home. They did not break down his front door and barge right in.